Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is Rack awareness?

1039

How will format the HDFS ?

1113

what are the steps involved in commissioning adding

941

How to use Apache Zookeeper command line interface?

1197

Can NameNode and DataNode be a commodity hardware?

1725

What are the steps to submit a Hadoop job?

950

What is the heartbeat used for?

1080

How would you tackle counting words in several text documents?

1057

What are the Basics of Hadoop?

964

Explain the shuffle?

953

How blocks are distributed among all data nodes for a particular chunk of data?

1148

How can I install Cloudera VM in my system?

1009

How we can take Hadoop out of Safe Mode?

IBM,

892

What is Writable & WritableComparable interface?

960

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1111

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Un-Answered Questions { Apache Hadoop }

How will format the HDFS ?

1113

What is HDFS ? How it is different from traditional file systems?

947

Can Apache Kafka be used without Zookeeper?

1080

Is hadoop a memory?

737

What are the modes in which Apache Hadoop run?

831

What's the best way to copy files between HDFS clusters?

1390

Explain the features of fully distributed mode?

670

How many instances of JobTracker can run on a Hadoop Cluser?

1049

What is high availability in hadoop?

710

What is the difference between a Hadoop and Relational Database and Nosql?

1108

What are the additional benefits YARN brings in to Hadoop?

1008

what is the typical block size of an HDFS block?

952

What is inputformat in hadoop?

791

Explain the overview of hadoop history breifly?

651

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

662

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